We consider the minimal extension of the supersymmetric standard model (extended by the addition of a single chiral supermultiplet to induce Higgs mixing). Just as in the standard model, the lightest particle is expected to be stable, making it a dark-matter candidate. Unlike, the standard model, for certain values (signs) of parameters, the dark-matter candidate may be quite light. In this paper, we discuss in detail the conditions for a light dark-matter candidate in the minimal extension of the supersymmetric standard model.
Bibliographical noteFunding Information:
We would like to thank R. Flores, with whom we collaborated on early work on this project. We would also like to thank M. Srednicki for useful communications. This work was supported in part by DOE grant DE-83ER-AC02-40105 and by KAO's Presidential Young Investigator Award.